Proposal to introduce phase 2 amendments related to the booster seat category (booster seat with backrest) into UN R129. The text includes all modifications proposed by GRSP up to and including its 57th session (Geneva, 18–22 May 2015) as well as those of the IWG CRS up to and including its 53rd session (London, 2 September 2015). The proposal builds on the original UN Regulation No. 129, Corrigendum 1, Supplements 1, 2, 3 and 4 as well as the draft 01 series of amendments to the UN Regulation (ECE/TRANS/WP.29/GRSP/2015/24) Phase 1.

Proposal to limit the use of a booster cushion (booster seat without backrest) with children of a stature greater than 125 cm and the application for type approval of such CRS only in mass Group III for children of mass from 22 kg to 36 kg. The proposal is submitted on behalf of the CRS informal working group.

Proposal to clarify that a guide strap which constrains the shoulder strap of the adult seat belt in a position to suit the child in a child restraint system cannot be approved as a separate CRS under UN R44.

The GTR7 Informal Working Group has been preparing amendments to the regulation with regard to head restraint height, use of the BioRID test dummy, and to improve the overall text. This document provides the current draft text with open items enclosed in brackets.